Explosive fire-alarm.



No. 681,637. Patented Aug. 27,19m. s. c. aumms.

EXPLOSIVE FIRE ALARI.

(Applimfion fllld D00. 8, 1800.)

(Ilo Model.)

1 I I (/Z7/ uAfim'geys UNITED STATES PATENT OFFICE.

SHERMAN O. GUTHRIE, OF FINDLAY, OHIO, ASSIGNOR OF ONE-HALF TO H. W.GUTHRIE, OF ELMORE, OHIO.

'EXPLOSIVE FIRE-ALARM.

SPECIFICATION forming part of Letters Patent No. 681,637, dated August27, 1901. Application filed December 8, 1900. Serial No. 39,151. (Nomodel.)

To all whom it may concern:

Be it known that I, SHERMAN C. GUTHRIE, a citizen of the United States,residing at Findlay, in the county of Hancock and State of Ohio, haveinvented a new and useful attachment for electric call-bells as an alarmin case of fire in places where such call-bells are used and to beoperated by an explosive; and I do declare that the following is a full,clear, and exact description of the invention.

The invention relates to improvements in explosive fire-alarms.

The object of the presentinvention is to improve the construction offire-alarms of that class which in event of a fire will automaticallyclose the circuit and ring a bell and to provide a simple andinexpensive device of this character designed to be used in connec tionwith a call-bell and adapted to be readily mounted adjacent to apush-button and capable of automatically engaging the same and ofsoundinga continuous alarm in event of a fire.

The invention consists in the construction and novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claims hereto appended.

'In the drawings, Figure 1 is a perspective view of a fire-alarmconstructed in accordance with this invention, the casing being brokenaway to illustrate the interior mechanism. Fig. 2 is a verticalsectional View of the same.-

Like numerals of reference designate corresponding parts in both figuresof the drawings.

1 designates a metallic box or casing designed to be secured to a walldirectly in front of a push-button 2 and provided with a plunger 3,adapted to be actuated by a spring at in event of a fire, as hereinafterexplained.

The plunger is mounted in a suitable guide or way, preferably composedor bars or cleats 4 and cross-pieces 5 and 6, and these parts the barsor cleats and the cross-piecesals0 form a support for abomb and aremounted on a shelf 7, arranged within the casing.

The plunger 3 is adapted to reciprocate longitudinally and is locateddirectly in line with the push-button, and it is also connected with therod 8, extending through the outer wall of the casing and terminating ina suitable head or button and adapted to be pushed inward by hand tooperate the push-button and ring the call-bell. The plunger extends tothe push-button 2, which is spring-actuated, and the spring thereof isadapted to force the plunger outward after the latter has been operatedby hand. The spring, which is adapted to actuate the plunger, is securedat its lower end to the bottom of the casing by a screw or othersuitable fastening device, and it is provided at its upper end with anarm or extension 9, projecting above the outer end of the plunger andadapted to be engaged by a setting-bar 10, which is interposed betweenthe bar 6 and the upper free end of the spring and which is adapted tohold the same in a flexed condition, as illustrated in Fig. l of thedrawings. The setting-bar 10 is supported upon the small bomb 11, whichis provided with suitable fuses 12, extending through perforations 13and 14: of the support and the casing and adapted to be arranged indifferent portions of a room and to be ignited by a fire therein. Inevent of a fire the fuses will be ignited and the bomb exploded, whichexplosion will throw the setting-bar out of engagement with the springand release the latter. The spring will reciprocate the plunger anddepress the pushbutton, and thereby ring a continuous alarm.

What I claim is- 1. In a device of the class described the combinationof a casing provided with a suitable guide or way, a reciprocatingplunger mounted in the guide or wayand adapted to engage and depress apush-button, a spring arranged to engage the plunger, and a settingbarholding the spring against movement and adapted to rest upon abomb andto be thrown by the same out of engagement with the spring,substantially as described.

2. In a device of the class described the combination of a casingdesigned to be mounted over a push-button and provided with a guide orway, a plunger mounted in the guide or way, a spring arranged to engagethe plunger, a setting-bar holding the spring against movement, a bombfor throwing the settingbar out of engagement with the spring, and

10 or way, a spring arranged to engage the plunger and secured at oneend, asetting-bar engaging the other end of the spring to hold thelatter against movement, and a bomb for throwing the setting-bar out ofengagement with the spring, substantially as described.

SHERMAN O. GUTHRIE.

Witnesses:

JNo. SHERIDAN, OHAs. T. WEED.

